Internal-combustion engine.



II. 8. SMITH. I

INTERNAL COMBUSTION ENGINE. APPLICATION 'FILED FEB. 8. I911.

1273,9 13. Patented July 30,1918.

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Wa'iwee-sea Evan/50 @UNITED STATES, PATENT oEmcE.

REUBEN STANLEY siu'rn, or MIL AUKEE, wrscoNsrN, AssreNo 'ro L10. sm'rn y CORPORATION, E EDDYVILLE, NEw YORK, A coEroEArroN or N W roan INTERNAL-COMBUSTION ENGINE.

Original appllcation nled August 20, 1914, Serial No. 857,692. Divided and this application flled lebruary 8, I ,1917. Serial l fo. 147,377. 1

To all whom it may concern} Be it known that -I, REUBEN STANLEY SMITH, a citizen of the-United States, residing at Milwaukee, in the county of Milwaukee and Stateof Wisconsin, have invented a certain new and useful Improvement in Internal-Combustion Engines, 9f which the following is a full,.clear, concise, and exact description, reference being bad to the accompanying'drawings, forming a part of this specification.

My invention relates to devices used in connection with internal combustion engines for isolating spring mechanism usually employed in connection with valves disposed in the inlet and outlet ports of an internal combustion'engine, the object being to support the spring mechanism from the casing of the internal combustion engine in. a manner such that no heat, or a very small portion thereof, will be transmitted to the spring mechanism, thus-allowing the spring to maintain its temper.

This application is a. division of my copending application Serial No. 857,692, filed August 20, 1914. I Generally, the device of my invention consists in a forked spacer, preferably stamped of sheet metal, in the form of acup, having prongs, or forks, extending from-the cup so as to provide a seat against which the spring for controlling theinternal combustion engine valves is positioned.

Myinvention will be moreclearly understood by referring to the accompanying drawings, in which: Y 4 Figure 1 is a view partly in elevation and partly in section ofan internal combustion engine provided with the forked spring spacer of my invention;

Fig. 2 is a plan view of the forked spacer;

Fig. 3 is a side elevational view thereof. Similar reference characters refer to similar parts throughout the several views.

I have illustrated at 4 an internal combustion engine provided with a cylinder 5 in which is arranged to reciprocate a working piston 6 provided with the usual pitman rod 7 connected with the crank shaft of the engine. The crank shaft has mounted thereon the usual fly wheelS. Geared to thecrank shaft of the engine is a cam shaft 9 provided with lugs, or cam surfaces, 10, each Specification of Letters Patent.

21. Fig. 1, has its lower portion cup shaped so 'as to tightly fit around a downwardly (BX- tion.

Patented July 30,1918.

- arranged to engage a plunger 11 slidably mounted in the casing 12. The plunger 1.1

may be provided with a slot 13 through which extends a pin 14: secured into the easger. a head 15 arranged when. the plunger is moved upwardly'to engage the rod'16 of the exhaust valve 17 The lower end of the exhaust valve 'rod 16' has rigidly secured thereto aring- 18 upon which rests a collar 19. The collar 19 serves as an abutment for the spring 20, the other end of the spring being positioned against the forked spacer This forked spacer, as illustrated in tending boss '22 carried by the casing of the internal combustion engine. The spring 20,

as will readily be seen, serves to retain the exhaust valve 17in its closed, or down, posi- The inlet valve illustrated in the drawings, comprises a rod 23, inlet valve .24, spring 25, and spider 26, the spring 25 being interposed between the spider 26 and the pin 27 carried by the upper end of the rod 23. The spring valve serves to normally hold the inlet valve in its closed, or up, po-

sition. 28 illustrates a portion ofthe car 'bureter, or an intake manifold bolted or otherwise secured to the engine. If desired a cam operated. intake may be employed with the forked spacer illustrated in connection with the exhaust valve instead of the automatic intake illustrated in the drawings. As illustrated in' Figs. 2 and 3, the forked spacer, comprises a cup shaped'portion" 29 1 which has extending upwardly from it four arms, or prongs, 30- 30. These prongs are bent outwardly, as illustrated in Figs. 1 and x 3, thereby isolating the prongs from the stud 22 of the engine casing. It will readily be seen that air may, therefore, be circulated between the prongs and the tubular boss and thereby prevent the arms and, therefore, the spring 20 from becoming heated.

a spring disposed around said stem and having one end resting against said shoulder, a forked spacer disposed against said boss, the arms of said forked spacer serving as an abutment for he other end of said spring and spacing the spring from the boss, and means for Operating said stem to open the valve againstthe tension of said spring.

3. An internal combustion engine C0111- prising a reciprocating rod, a shoulder carried h the rod, a spring disposed around said rod. and having one end resting against said shoulder, and a forked spacer supported troin the casing of the internal combustion engine, the arms 01 said forked spacer serving as an abutment for the other end of said spring and spacing the spring fromthe engine casing.

3. An internal combustion engine cornprising a reciprocating rod, a shoulder carried by the rod, a spring disposed around said rod and having one and resting against said shoulder, and a cup shaped forked spacer supported from a circular boss of the e's spas casing of the internal combustion engine the arms of said spacer serving as an abutment for the other end of said spring and spacing the spring from the engine casing.

4. An internal combustion engine comprising a reciprocating rod, a shoulder carried by the rod, a spring disposed around said rod and having one end resting against said shoulder, a cup -shaped forked spacer supported from a circular boss of the casing of the internal combustion engine, the arms of said spacer serving as an abutment for the other end of said spring and spacing the spring trom the engine casing, said arms having free ends out 01 engagement with the engine casing. I

In Witness whereof, I hereunto subscribe my name this 27th day oi. January, A. D. 1917, 

